Load Balancing Scheme with PTM Mode for Multicast Services Between MBSFN

quality of service support for load balancing [10] is proposed in heterogeneous cellular networks, and it considers both user’s achievable rate and load level of each BS by network-wide weighted utility maximiza-tion. The chunk-based resource allocation for multicast OFDMA systems [11] is introduced to maximize the total throughput with the bit error rate ( BER) con-Load ABSTRACT: In long term evolution (LTE) networks, the multicast services can be transmitted by single frequency network (SFN) mode or point-to-multipoint (PTM) mode, and the unicast services are delivered with point-to-point (PTP) mode. To avoid the network congestion in the LTE networks with the multicast and unicast mixed services, a load balancing (LB) scheme with PTM mode is proposed to minimize the demanded radio resources of the maximum load cell. The system model of the demanded radio resources is based on the signal to interference noise ratio (SINR) of multicast services with SFN mode and PTM mode. Then the minimization problem is solved by means of simulated annealing (SA) heuristics. It selects the optimal transmission mode between SFN and PTM for multicast services. Simulation results show that the proposed LB needs less demanded radio resources of the maximum load cell than SFN mode for all the multicast services.

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